Valve-gear.



PATENTED APR. 17, 1906.

'HARTMANN. VALVE GEAR.

APPLICATION FILED JUNE 2,1904.

3 SHEETSSHEET l.

w M N- 1 M 0. B my n y u a 0 O O l 9 & H 2 3C id 7 6 12C D M m W7 5% No. 818,166. PATENTED APR.17, 1906. Q

W. HARTMANN VALVE GEAR.

APPLICATION FILED JUNE 2,1904.

3 SHEETSSHEBT 2 w/r/vamfa PATENTED APR. 17, 1906.

W. HARTMANN.

VALVE GEAR.

APPLICATION FILED mm: 2, 1904.

3 SHEETS-SHEET 3.

states springs take up work during the movement of t e actuating devices in one direction and do work ing devices in the 0 positedirection.

From the foregoing it is evident that very little power is'required for runningthe valveto gear, and the functioning of the governoris not influenced by reacting forces in thevalvegear. 1

Having thus described my invention, I claim as new and desire to secure by Letters Eat'ent- '1. A valve-gear for intermittently and positively actuating a valve, comprising a valve-levercoiinected with the valve, aroclcing cam engaging the said valvcdever, for the co latter to open the valve, and a clutch member samedfor closing t e valve.

rocking in unison with the said rocking cam, said clutch member being mounted on the ivot of tlie'valv'c-lcver engaging the said valve-lever, to im art a return motion to the 2. A valvegear for intermittently and positivelyspctuating a valve, comprising a valve-lever connected with the valve, a rock ing cam engaging the said valve-lever, for the o latter to openthe valve, a clutch member rocking in' unison with the said rockin cam and arranged fo: engaging the said va ve-lever, to impart a return motion to the same, for closing the valve, and a locking device .nt1'0lled by the said rocking cam, for engaging the said valve-lever to lock the latter against movement during the return stroke of therocking cam and the said clutch memberf 3. A valve-gear ior intermittently and 10 positively actuating a valve, comprising a valve-lever connected with the valve, a rocking cam engagin the said valve-lever, for the V latter to open t e valve, a clutch member rocking in unison with the said rockin cam and arranged for engaging the'said va ve-le ver, to impart a return motion to the same, for closing the valve, and a locking device controlled by the said rockin cam, for engaging the said valve-lever to lock the latter against movement during the return stroke a i oi the rocking cam and the said clutch member, the saidlockin device consisting of a PIOJBC-UOII on the va ve-levcr and a pawl for engaging the said PIOJGCllOIl.

4. A valve-gear for intermittently and positively actuating a "valve, comprising a valvelevcr connected with the valve, a rock- .ing cam engaging the said valve-lever, for the latter to open the valve, a clutch member so rocking in unison with the said rockin cam and arranged for engaging the said va ve-led uring the movement of the said actuatver, to impart a return motion to the same, for closing the valve, and a locking device controlled by the said rockin cam, for engaging the said valve-lever to ock the latter against movement during the return stroke her, the said locking device consisting of a pro'ection on the valve-lever, an arm rocking Wit the cam-lever, an escapement-lever controlled by the said arm and a pawl movin with the said escap'ementrleven. and adapted to engage the said projection.

5.. A valvegear for intermittently and positively actuating a valve, comprising a valve-lever connected with the valve, a rocking cam engagin the said valvedever, for the latter-to open the valve, a clutch member rocking in unison with the saidrochin cam and arranged for engaging the said va ve-lefor closing the valve, and an actuating device for the said cam and clutch, consisting of a ,link connected at one end to the cam and the clutch, a pivoted arm engaged by the other nccted with the eccentric-rod and a link connectin the said pivoted arm with the eccentric-r0 at a point such as 11 adapted to transfer motion only during one part'of the revolution to the pivoted arm.

6. A valve-gear for intermittently and positively actuating a valve, comprising a valve-lever connected with the valve, a rocking cam engaging the said valve-lever, for the latter to open the valve, a clutch member rocking in nnisdn with the said rocking cam and arranged for engaging the said va ve lever, to impart a' return motion to the same, for closing the valve, and a tension device for the valve, under tension during a part of the stroke, and to deliver work during another part of the valverstroke.

7. In a valve-gear, lot and exhaust valves, mechanism for operatmg each valve positive! to both open and close it, casings through inlet-valve stern projects having an, open exhaust-valve stem [)IOjdCl a having an open inner end, collars on the valve stem, and

e ollars, and the closed ends of the casings as and for the purpose set forth.

name to this specification in the presence of two subscribin 'witncsses.

, vvIL ELi i HARTMANN. Witnesses:

JOHANNEB Hana,

WoLnnMAit HAUPT.-

of the rocking cam and the said clutch mem ver, to impart a -return motion to the same,

which the valvestems project, the casing through which the outer end and the casing lhnniyh wl'iichthe In testimony whereof I have signed my end of the link, an eccentric, a rock-arm cofithe combination of ins rings surrounding the valve-stems between t 7 

